There are nearly 30,000 public wireless “hot spots” in the United States at places such as parks and cafes, but there’s more to consider than just where to log on. Many people don’t realize they could have all their personal data stolen while checking out their checking account. Anybody with some tech know-how and the right tools can break into the basic level of wireless security that’s commonly used. People need to understand that nothing is truly private at a wireless hot spot.